(Taxon-specific: Order Cumacea) Posterior opening of digestive tract. Located at end of last (sixth) pleonite or on ventral surface of telson (in the latter case occasionally divided telson into preanal and postanal parts). Flanked by pair of anal valves.
[Stachowitsch, 1992]

(Taxon-specific: Order Tanaidacea) Posterior opening of digestive tract to exterior. Located on ventral surface of telson.
[Stachowitsch, 1992]

(Taxon-specific: Order Decapoda) Posterior opening of digestive tract; located on ventral surface of telson.
[Stachowitsch, 1992]

(Taxon-specific: Order Amphipoda) Posterior opening of digestive tract to exterior; located ventrally at base of telson.
[Stachowitsch, 1992]

(Taxon-specific: Order Isopoda) Posterior opening of digestive tract to exterior; located ventrally at base of telson.
[Stachowitsch, 1992]

(Taxon-specific: Order Mysida) Posterior opening of digestive tract; located on ventral surface of telson.
[Stachowitsch, 1992]

(Taxon-specific: Subclass Branchiura) Posterior opening of digestive tract. Located at posterior end between two lobes of abdomen; typically flanked on each side by minute caudal ramus.
[Stachowitsch, 1992]

(Taxon-specific: Subclass Cirripedia) Posterior opening of digestive tract. Located near posteriormost thoracic appendages. i.e., between sixth pair of cirri; in ascothoracican at end of abdomen.
[Stachowitsch, 1992]